package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.hssf.record.DVALRecord;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDate;
import java.time.LocalDateTime;

/**
 * 功能:切面类 实现公共字段填充逻辑
 * 作者:Dksheep
 * 日期:2024/11/1518:49
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    //切入点
    // 在mapper该包里 且 加上了AutoFill注解
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void auotFillPointCut(){

    }
    @Before("auotFillPointCut()")
    public void autoFill(JoinPoint joinPoint){

        //获取数据库的操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class); //获得方法上的注解对象
        OperationType operationType = autoFill.value();

        //获取实体对象
        Object[] args = joinPoint.getArgs();
        if(args == null || args.length == 0)
            return;
        Object entity = args[0]; //此处约定第一个参数为实体对象

        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();
        if(operationType == OperationType.INSERT){
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //通过反射对象属性赋值
                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currentId);
                setUpdateUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        else if(operationType == OperationType.UPDATE){
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
            }
            catch (Exception e){
                throw new RuntimeException(e);
            }

        }
        
        log.info("开始公共字段填充");
    }

}
